Perez, Eduardo Gualtieri de Andrade, et al. “Effect of Glutathione on the Function and Oxidative Status of Ovine Cryopreserved Sperm”. Brazilian Journal of Veterinary Research and Animal Science, vol. 49, no. 4, Aug. 2012, pp. 262-8, https://doi.org/10.11606/issn.1678-4456.v49i4p262-268.